GNOME
The "GNU Network Object Model Environment", GNOME is part of the GNU project and part of the free software, or open source movement. GNOME is a Windows-like desktop system that works on UNIX and UNIX-like systems and is not dependent on any one window manager. The current version runs on Linux, FreeBSD, IRIX and Solaris. The main objective of GNOME is to provide a user-friendly suite of applications and an easy-to-use desktop. Gnome is used by Redhat as the default GUI.